i agree with Daox, sorta. but really the only way to "grade" them is to assign a value to each car and take the top scores. BUT, afaik, they only go up to 5 stars in safety and ive never seen a car in the last 5 years get less than a 4.
*As of 2011 the rating system has been revamped and are not comparable to earlier ratings. 2011+ ratings have a much higher baseline allowing for better resolution, still not as good as a 1-10 rating though.
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